磁性固体超强酸制备及催化合成乙酸正丁酯研究  

Study on the preparation of magnetic solid super acid and catalytic synthesis of n-butyl acetate

作　　者：杨阳[1] 李裕[1] 

机构地区：[1]中北大学化工与环境学院,山西太原030051

出　　处：《无机盐工业》2015年第3期68-72,共5页Inorganic Chemicals Industry

基　　金：山西省科技重大专项项目(20111101013)资助

摘　　要：采用沉淀浸渍法,以尖晶石结构的纳米铁酸镍为磁性基质,成功制备了S2O82-/ZrO2-Al2O3-NiFe2O4磁性固体超强酸催化剂。利用傅里叶变换红外光谱仪(FT-IR)、氮气吸附-脱附、振动样品磁强计(VSM)等对样品进行表征。结果表明,在n(锆)∶n(铝)∶n(镍)=1∶3∶1条件下制备的纳米催化剂,比表面积高达313 m2/g,表现了超顺磁特性。将催化剂应用于合成乙酸正丁酯反应中,在n(乙酸)=0.2 mol、n(乙酸)∶n(正丁醇)=1∶1.8、催化剂加入量为1 g、反应时间为2 h条件下,酯化率达到93%以上。催化剂重复使用结果表明,该催化剂可以重复使用5次,是一种新型友好的绿色催化剂。S2O8^2-/ZrO2-Al2O3-NiFe2O4 magnetic solid superacid catalyst was prepared by precipitation impregnation method, with nano-sized nickel ferrite with spinel structure as magnetic matrix.The samples were characterized by Fourier transform infrared spectroscopy（FTIR） ,nitrogen adsorption-desorption ,and vibrating sample magnetometer（VSM） etc..Results showed that under the condition of n （Zr） ：n （Al） ：n （Ni） =1：3：1 ,the specific surface area of the prepared nano-catalyst was up to 313 m^2/g and it exhibited superparamagnetic features.The magnetic solid acid catalyst was used in the synthesis of butyl acetate reaction,The optimal conditions for synthesis ： n （ acetic acid ） =0.2 mol, n （acetic acid ） ：n （n-butanol） = 1 ： 1.8, catalyst added amount was 1 g, and reaction time was 2 h.The esterification rate reached of 93% or more under the above mentioned conditions.Meanwhile experiments showed that the catalyst can be used 5 times repeatedly.Therefore,it is a new greenfriendly catalyst.

关 键 词：磁性固体超强酸 制备 表征 催化酯化 

分 类 号：TQ225.2[化学工程—有机化工]